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<?php

/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Symfony\Component\CssSelector;

/**
* XPathExprOr represents XPath |'d expressions.
*
* Note that unfortunately it isn't the union, it's the sum, so duplicate elements will appear.
*
* This component is a port of the Python lxml library,
* which is copyright Infrae and distributed under the BSD license.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class XPathExprOr extends XPathExpr
{
    /**
* Constructor.
*
* @param array $items The items in the expression.
* @param string $prefix Optional prefix for the expression.
*/
    public function __construct($items, $prefix = null)
    {
        $this->items = $items;
        $this->prefix = $prefix;
    }

    /**
* Gets a string representation of this |'d expression.
*
* @return string
*/
    public function __toString()
    {
        $prefix = $this->getPrefix();

        $tmp = array();
        foreach ($this->items as $i) {
            $tmp[] = sprintf('%s%s', $prefix, $i);
        }

        return implode($tmp, ' | ');
    }
}
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